Lesson 3/Learning Event 1
LEARNING EVENT 1:
THE M12A1 PDDA BY THE OPERATOR
Troubleshooting is a process by which a problem is identified, diagnosed as
to the probable cause, and then a corrective action is decided on. In order
to perform troubleshooting on the M12A1 PDDA, the operator must first learn
how to identify a problem.
A problem exists when one or more of the
following conditions are present.
Failure to start
Failure to function properly
Excessive operating noise
Once a problem is identified, the next step is for the operator to identify
the most probable cause of the malfunction. This phase of troubleshooting
the operator would restrict the inspection for the probable cause to the
engine and directly related components.
After identifying the most probable cause of the problem, the operator must
then decide on the proper corrective action to perform. A corrective action
is a service or repair necessary to eliminate the problem. In addition, the
operator must decide whether this action can be accomplished at the operator
level or must be referred to a higher category of maintenance.
To assist the operator in making these determinations, a troubleshooting
table is shown in figure 8 on pages 33 through 35. This table illustrates
the malfunction, probable causes of the malfunction, the corrective action
required, and at what level the corrective action can be performed.
this table whenever you need to troubleshoot the M12A1 PDDA.